Machine for lapping bearings.



P. KEIL.

MACHINE Pon LAPPING BEARINGS.

APPLICATION FILED JULY 22, 1910.

Pateted oct. 21, 1913 3v SHEETS-SHEET 1.

m, ik l lrnllliffrllllv I Ma/76,5565

P. KEIL.

MACHINE POB. LAPPING BEARINGS.

APPLICATION FILED JULY 2z, 1910.

3,026,636, 'Patented @en 21, w13.

3 SHEETS-SHEET 2.

i l Immun P. KEIL.

MACHINE POB. LAPPING BEARINGS.

APPLIOATION FILED JULY 22,1910.

190176,636 P111e111e1001211913.

ff' i/f 6 l 1 n ml; y 1 e l "rrnn sratras ramena ernten.

PETER KEIIA,` 0F ELKHART, INDIANA, ASSIGNOR 0F ONE-THIRD TO JOSEPH E.COCHRAN AND ONE-THIRD TO E. A. STEPHENS, 0F ELKHART, INDIANA.

MACHINE FOR LAPPNG BEARINGS.

Specification of Letters Patent.

Patented @et 2li, 319113v Appucation ai'ea Jury e2, 191e. serial No.578,258.

' tication.

rlhis inventionrelates to bearing lapping machines, 'and has for itsgeneral object to provide an improved construction, combination andarrangement of parts in a machine of this character.

Qne ot the objects of this invention is to provide improved meanswhereby the 'lapping operation may be performed in a plurality ofsuccessive stages. l

Another object is to provide improved means whereby the lappingoperations may be performed within an emulsion of abrasive material soas to maintain an ever present supply of the emulsion between thelapping bars and the bearing surfaces of the bearings.

Other and further objects will appear in the specification and bespecifically pointed out in the appended claims, reference being had tothe accompanying drawings exemplifying` the invention and'in which-Figure 1 is a side elevation of a machine constructed in accordance Withthe principles of this invention. Fig. 2 is a top plan view of the same.Fig. 3 is a section on thev line III-IH, Fig. 2. Fig. 4 is an .enlargeddetail fragmentary view of a portion of the machine shown in Fig. 3. l3`ig. 5 is a view from the right end of Fig. LL.

Referring more specitically to the drawings, and more especially to theembodiment of the invention shown therein, thebearing lapping machine isprovided with a main base member or bed l rigidly mounted in anysuitable manner, preferably on the legs 2. Rigidly secured upon theybase member 1 by means of a plurality otbearing blocks 3, are aplurality ot paired u rights 4l., each pair of uprights being for tiepurpose ot' mounting an adjustable transverse trame 5 comprisingoppositely disposed bearing blocks 5 slidably mounted on the uprights land rigidly connected by an integral. cross-bar (S. The frame 5 ismaintained in adjusted position by the thumb screws 6', Which'a-remounted in the blocks and adapted when tightened to bind against theuprights 4. The frame may be elevated or lowered so that bearings' ofdifferent sizes may be lapped. ln orderto provide suitable means forholdinga plurality of bearings against la 'eral displacement while theyare having then bearing surfaces lapped, a transverse bar orsupport 7 isrigidly connected with the bearing blocks 5, by means of a pair ofdepending lugs S to which the support 7 is secured by means oli screwsor other suitable fastenings. The bed 1, uprights 4 and transverse framecomprising the blocks 5, cross bar 6 and support 7,

form one of two relatively movable members, by the relative movement ofwhich the lapping operations are accomplished. rlhe movable member isprovided by means of a table or movable support 9, which is reciprocablymounted upon the bed or base member 1 by lniving aired grooved rollers10 rotatably mounte( in bearin brackets 11, said rollers 10 being adapteto ride on a pai;` of il-shaped guides or rails l2 Yformed on the bed ofthe machine. ln order to provide means for reciprocating the table S onthe guide rails 12, a shaft 13 rotatabiy mounted upon the bed 1,preferably adjacent one end of said bed, is adapted to transmit power toa depending arm 14 rigidly secured to the under side ofthe table 9, bymeans of a crank arm 15 keyed to the shaft 13 and a connecting rod 16,which iS pivotally connected at one end to the crank 15, and at theother end to the arm 14. A pulley 17 may heikeyed to the shaft 13 toprovide means ivliereb f power may be delivered to the machine from apower shaft by means of a belt (not shown).

In order to provide simple and etlieient means for maintaining an everpresent supply ot an abrasive emulsion between the bcaringsurtaces ofthe 4bearings to be lapped, and the lapping bars presently *so bedescribed. the reciprocating 'table 9. according to tht` presentembodiment oit the invention, has mounted thereon a pair oit tanks orreceptacles 18. each oi. said re copiar-ies being provided with a pairoil lugs 19. by means of which they may be clamped to the table 9. bymeans of clamps 20, which are secured to Said table by means o bolts 21.Paralleily disposed Ylivitliin each tank 20 are a plurality of flappingrbars 22, 24;, Q5, 26, etc. These lapping hars are removably secured tothe bottom ofthe tanker 'iti vposed directly above 'against the bearing30.

Ywhen said lapping bars have become dulled by usage, they may be removedand reground. As shown best in Fig, 4, the lapping bars 22, 23, arepreferably adapted to grind the sloping sides of the grooves, While vthebars 24, 25 are adapted to grind the points of the grooves. Preferably,the four bars 22, 23, 24 and 25 are intended to rough grind the bearinggroove, While the bar 26 is intended to finish the points of thegrooves, as Well as the sloping sides thereof. l/V ith this method ofoperating the machine, as soon as the lapping bar 25 becomes dulled byusage, the roughing operations may be performed by the bars 23, 24, 25Aand 26, and the finishing operation given over to the additional bar27, this plan being carried out until all of the lapping bars have beenused.

As shown most clearly in Figs. 4 and 5y the transverse bar or Asupport 7is provided With a plurality of openings 29, which are disthe bars 22,28, etc. The openings 29 are made of just the proper size to receive thebearing 30, Which may be of agate, or any other suitable material. Inorder to provide means for maintaining a uniform pressure between thebearing 30 and the lapping block 22, the cross-bar G has reciprocablymounted therein a plurality of plunger rods 31 provided on their lowerends with lballs 32, adapting them to bear Preferably, said plungers 31are forced against the bearing 30 by means of a spiral spring 33interposed between the cross-bar 6 and each ball 32. As shown in Fig.5,v each plung'erl 3l has pivotally connected thereto at its up; er enda shifting lever 34, which is. pivoted intermediately of its -ends-at 35in a prolap box 20 by means of screws 2S, so that I 4jection 36 on thecross-bar 6.

lVhat I `claim is: A

l. A machine forfkpping bearings Which comprises a lapping member, apressure member yieldingly holding the bearing in lapping continuouscontact with said lapping member, and means for imparting relativereciprocating movement to said lapping member and bearing.

2 I n a machine for lapping bearings, the combination of a stationarymember and a movable reciprocating member, a lapping device mounted onone member, means 'carried by the other member adapted to hold a bearingagainst lateral displacement, and means resiliently mounted on saidother member for pressing the bearing continuously against the lappingdevice.

S3. In a machine for lapping bearings, the combination of stationary andreeiprocally movable supports,a bath of lapping emulsion, a lappingdevice carried by one of said supports and having its lapping surfaceimmersed "in said bath, and a pressure ing said bars,

face against the lapping surface of said lap-- ping device, and meansfor imparting reciprocating movement to said movable support andbearing. 5. In a machine for lapping bearings, the combination With astationary member, a movable member reciprocably mounted onsaidstationary member, a bath of lapping emulsion carried by one of saidmembers, a lapping bar mounted on one of said'members with its lappingsurface immersed in said lapping bath, and means mounted on the other ofsaid members adapted to hold a bearing against lateral displacementduring the relative movement of said members, and resilient means forpressing the bearing 'against said lapping bar. v 6. In a machine forlapping bearings, the combination with ajbase member, of a tablerccinrocably mounted thereon, a lappingbar mounted upon said table, saidbar being adapted to lit thebearing surface of the bearing, meansrigidly mounted on said base member adapted' to hold the bearing againstlateral displacement, and means for pressing the bearing yieldinglyagainst said lapping .table longitudinally of the reciprocable movementof the table, a container for lapping emulsion surrounding the saidlapping bars and adapted to contain a bath immersa transverse supportlrigidly mounted on said base member and adapted to hold a bearing aboveeach lapping bar, and means connected with said transverse support forpressing the bearings against said lapping bars.

`8. In a machine for lapping bearings, the combination With a basemember, of a transf verse frame rigidly mounted thereon, a supportcarried by said frame, said support being. provided With a plurality ofopenings each adapted to receive a bearing member, a reciprocallymovable table mounted on the base member, a lurality of lapping barssecured to said ta le, said bars being disposed respectively under theopenings in said transverse support, and a plurality ofmounted in thetransverse frame support, said plungers being adapted to grinder.

(opies oi this patent may be obtained for plungers reciprocably mountedin the transverse frame above said openings 1n said press the bearingsagainst the lapping bars.

9. ln a machine for lapping bearings, the combination with a basemember, of a transverse framerigidlymounted thereon, a support carriedbysaid frame, said support being provided with a plurality of lopeningseach adapted to receive a bearing member, and a plurality of plungersreciprocably above said openings in said support, said plungers beingadapted to press the bearings against the lapping bars, said lappingbars being suitably formed to lap diii'erent portions of the bearingsurface of the bearings.

10. ln a machine for lapping bearings, the combination with areciprocable table, a plurality of lapping bars parallelly disposedthereon, a rigidly mounted support extending transversely of said bars,and provided with an opening above each bar for the reception of abearing to be lapped, and a vreciprocable plunger mounted above eachopening in said support and adapted to press the bearing against thelapping bar.

1l. In al machine for lapping bearings, the combination with areciprocable table, a plurality of lapping bars parallelly disposed tereon, a rigidly mounted support extending transversely of said bars andprovided with an opening above each bar for the reception of a bearingto be lapped, and a reciprocable plunger mounted above said opening insaid support and adapted to press the bearing against the lapping bar,said lapping bars being detachably secured to the table.

l2. A machine of the class described, a traveling bearing-grinder, incombination with an adjustable bearing-holder, adapted to automaticallytension the bearing into continuous grinding engagement with the 13. Amachine of the class described, comprising a moving platen and agrinding tool carried thereby, in combination vwith a bearing holderarranged to present the bearing to be ground continuously to the movingtool, and mechanism automatically compensating for the wearing andgrinding away of the bearing and tool.

14. A machine of the class described, comprising a moving platen andgrinding tools carried thereby, in combination with a verticallyadjustable resilientbearing-holder the combination with a base member,of a arranged to present bearings of different sizes to be ground to themoving tool, and

.mechanism automatically compensating for the wearing and grinding awayof the tool.

15. A multiple grinder comprising a plurality of moving grinders, incombination with a vertically adjustable multiple workholder, comprisinga plurality of resilient work holding members, each arranged toautomatically compensate for the Wearing away of the work and thegrinder.

16. In a machine for lapping bearings,

transverse frame adjustably mounted thereon, ,a Support carried on saidframe, said support being provided with a plurality of openings eachadapted to receive a bearing member, a reciprocally movable tablemounted on the base' member, and having a plurality of lapping barssecured thereto, said bars being disposed in alinement .with theopenings in the transverse support, and a plurality of plungersreeiprocatably mounted in the transverse frame above said openings inthe support, said plungers being adapted to tension the bearings towardthe lapping bars. l

17. ln a machine for lapping bearings, the combination with a stationarybase member, of a table reciprocably mounted thereon, a plurality oflapping bars mounted on said table longitudinally of the move- Yment ofthe table, a plurality of uprights disposed on said base member, atransverse frame adj ustably mounted on said uprigh'ts, a supportcarried by said frame, said support being provided with a plurality ofopenings each adapted to receive a bearing member and a plurality ofplungers reciprocably mounted in saidframe above said openings in saidsupport,'the. said plungers being adapted to press the bearings aga-instthe lapping bars.

18. A multiple bearing grinder, comprising a plurality of graduatedgrinders, in

combination with a plurality of independent bearing holders, eachadapted to present a Abearing to a corresponding grinder, automaticmechanism individual to each holder adapted to compensate for thewearing away of the bearing, and a common support for said holders.

ln testimony whereof l have signed my name to this specification, in thepresence of two subscribing witnesses, on lthis 19th day of July A. D.1910.

PETER KEIL.

Witnesses EDNA KniL, ROBERTA L. STAHR.

ve cents each, by addressing the Commissioner of atents,

Washington, D. C.

